Removed referential integrity code. Moved embed templatetag into core. Differentiated...

[philo.git] / models / nodes.py

diff --git a/models/nodes.py b/models/nodes.py
index 9c18e52..14f5063 100644 (file)
--- a/models/nodes.py
+++ b/models/nodes.py
@@ -4,9 +4,14 @@ from django.contrib.contenttypes import generic
 from django.contrib.sites.models import Site
 from django.http import HttpResponse, HttpResponseServerError, HttpResponseRedirect
 from django.core.servers.basehttp import FileWrapper
-from philo.models.base import TreeEntity, Entity, QuerySetMapper
+from django.core.urlresolvers import resolve, clear_url_caches
+from django.template import add_to_builtins as register_templatetags
+from inspect import getargspec
+from philo.models.base import TreeEntity, Entity, QuerySetMapper, register_value_model
 from philo.utils import ContentTypeSubclassLimiter
 from philo.validators import RedirectValidator
+from philo.exceptions import ViewDoesNotProvideSubpaths, AncestorDoesNotExist
+from philo.signals import view_about_to_render, view_finished_rendering
 
 
 _view_content_type_limiter = ContentTypeSubclassLimiter(None)
@@ -19,11 +24,20 @@ class Node(TreeEntity):
        
        @property
        def accepts_subpath(self):
-               return self.view.accepts_subpath
+               if self.view:
+                       return self.view.accepts_subpath
+               return False
        
        def render_to_response(self, request, path=None, subpath=None, extra_context=None):
                return self.view.render_to_response(self, request, path, subpath, extra_context)
        
+       def get_absolute_url(self):
+               root = Site.objects.get_current().root_node
+               try:
+                       return '/%s' % self.get_path(root=root)
+               except AncestorDoesNotExist:
+                       return None
+       
        class Meta:
                app_label = 'philo'
 
@@ -37,6 +51,9 @@ class View(Entity):
        
        accepts_subpath = False
        
+       def get_subpath(self, obj):
+               raise ViewDoesNotProvideSubpaths
+       
        def attributes_with_node(self, node):
                return QuerySetMapper(self.attribute_set, passthrough=node.attributes)
        
@@ -44,6 +61,13 @@ class View(Entity):
                return QuerySetMapper(self.relationship_set, passthrough=node.relationships)
        
        def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
+               extra_context = extra_context or {}
+               view_about_to_render.send(sender=self, node=node, request=request, path=path, subpath=subpath, extra_context=extra_context)
+               response = self.actually_render_to_response(node, request, path, subpath, extra_context)
+               view_finished_rendering.send(sender=self, response=response)
+               return response
+       
+       def actually_render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
                raise NotImplementedError('View subclasses must implement render_to_response.')
        
        class Meta:
@@ -58,12 +82,19 @@ class MultiView(View):
        
        urlpatterns = []
        
-       def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
+       def actually_render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
+               clear_url_caches()
                if not subpath:
                        subpath = ""
                subpath = "/" + subpath
-               from django.core.urlresolvers import resolve
                view, args, kwargs = resolve(subpath, urlconf=self)
+               view_args = getargspec(view)
+               if extra_context is not None and ('extra_context' in view_args[0] or view_args[2] is not None):
+                       if 'extra_context' in kwargs:
+                               extra_context.update(kwargs['extra_context'])
+                       kwargs['extra_context'] = extra_context
+               if 'node' in view_args[0] or view_args[2] is not None:
+                       kwargs['node'] = node
                return view(request, *args, **kwargs)
        
        class Meta:
@@ -78,7 +109,7 @@ class Redirect(View):
        target = models.CharField(max_length=200, validators=[RedirectValidator()])
        status_code = models.IntegerField(choices=STATUS_CODES, default=302, verbose_name='redirect type')
        
-       def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
+       def actually_render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
                response = HttpResponseRedirect(self.target)
                response.status_code = self.status_code
                return response
@@ -93,11 +124,18 @@ class File(View):
        mimetype = models.CharField(max_length=255)
        file = models.FileField(upload_to='philo/files/%Y/%m/%d')
        
-       def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
+       def actually_render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
                wrapper = FileWrapper(self.file)
                response = HttpResponse(wrapper, content_type=self.mimetype)
                response['Content-Length'] = self.file.size
                return response
        
        class Meta:
-               app_label = 'philo'
\ No newline at end of file
+               app_label = 'philo'
+       
+       def __unicode__(self):
+               return self.file.name
+
+
+register_templatetags('philo.templatetags.nodes')
+register_value_model(Node)
\ No newline at end of file